1. Introduction
The SPEA 3030 XJLink2 Carrier Board, hereafter called the Carrier Board, is XJTAG’s recommended
hardware solution for adding XJTAG boundary scan test capability to a SPEA 3030 bed of nails test system.
The Carrier Board is used in conjunction with XJLink2-3030 JTAG controller modules. It can support up to
two independent modules and can operate with either one or two modules fitted. Each module is used to test
a separate Unit Under Test (UUT) – modules cannot be used together for additional access on a single UUT.
2. System Overview
Figure 2 shows a simple block diagram of the Carrier Board and all the required connections. The external PSU
provides all of the power that is needed for both the Carrier Board itself and any connected XJLink2-3030
modules. The USB connection is linked via an on-board hub to the XJLink2-3030 module sockets.
The UUT connections go from the XJLink2-3030 module to the UUT via relays on the Carrier Board. This
ensures that the UUT is completely isolated from the XJTAG system during stand-alone bed-of-nails
testing in the SPEA 3030 ICT test phase.
During XJTAG testing, including boundary scan/ICT integrated testing the relays are controlled to connect
the pins (both signal pins and ground connections) of the XJLink2-3030 module to the UUT.
page 3 of 8
XJTAG-3030-Guide-20C-01
www.xjtag.com
SPEA 3030 XJLink2 Carrier Board
.
User Guide
XJLink2
-
3030
Module 1
Relays
Relays
XJLink2
-
3030
Module 2
USB cable
USB Hub
PSU
External PSU
PC / laptop
UUT 1
UUT 2
OO
Figure 1 – Carrier Board with no XJLink2-3030 modules fitted
Figure 2 – Carrier Board block diagram
Power connector
USB connector
Stiffening bars
System connector
